Gregory, P. H. (1974). Phytophthora disease of cocoa. Longman publishers.
Chicago Edition CitationGregory, P H. Phytophthora Disease of Cocoa. London: Longman publishers, 1974.
MLA Edition CitationGregory, P H. Phytophthora Disease of Cocoa. Longman publishers, 1974.
Warning: These citations may not always be 100% accurate.